Dumping bucket



Jan. 27, 1931. G. M. WAKEFIELD 7 1,790,034-

' DUMPING' BUCKET Filed June 5, 1930 2 Sheets-Sheet, 1

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1931- G. M; WAKEFIELD 1,790,034

I DUMPING BUCKET Filed June 5, 1930 25heets-Sheec 2 5 650E672- Male 44 lW/KEF/QD, i

Patented Jan. 27, 1931 PATENT OFFICE GEORGE MIG-HELL WAKEFIELD, OI RIVER FOREST, ILLINOIS DUMPIN G BUCKET Application filed June 5, 1930. Serial 1T0. 458,823.

This invention relates to buckets and, while not limited thereto, relates more particularly to an automatic dump bucket for use with traveling cranes and the like, and

has for one of its objects the provision of a. novel bucket construction which provides for automatic releasing and locking of the hinged bottom.

Another object is to provide a structure of this class which is simple in construction,

cheap to manufacture, and is strong and durable.

In the drawings:

Figure 1 is a side elevation of acrane and bucket, with the bucket lowered into engagement with a bin.

Figure 2 is a side elevation showing the bucket lowered into unlocking position.

Figure 3 is a similar view showing'the' bucket raised into unloading position.

Figure e is a side elevation showing the bucket lowered onto the floor to force the bottom up into locking position. a

Figure 5 is a side elevation of the bucket on a large scale and partly broken away to show details of construction.

Figure 6 is an end elevation of the bucket on a large scale.

Figure 7 is an elevation of approximately one-half of the end of the bucket opposite the end shown in Figure 6.

The bucket shown in the drawings and hereinafter described is particularly designed for transporting quantities of rivets 5 from storage bins to points of use in a factory.

The bucket designated generally by the letter A is adapted to be conveyed from place to place by a traveling hoist 2 which is mounted for travel on a monorail 3 and is provided with a trailing cab 4. The hoist 2 is provided with a hook 5 suspended by the usual hoisting cable 6 and adapted to engage the bail 7 of the bucket A.

The bucket A comprises a rectangular body or box composed of side and end walls wardly beyond their pivotal mountings an I 4 appreciable distance, as at 15.

Toggle levers 16 are pivotally mounted at one end, as at 17, to the side plates 13 of the bottom and have their other ends pivotally connected to the lower ends of the extended portions 15 of the bail arms, as at 18. The pivot points 17 of the toggle levers 16 are materiallybelow and slightly to the rear of the pivot points 14 of the bail arms.

Stops 19 are provided on the side plates 13 of the bottom to limit the forward movement of the toggle levers, and other stop lugs 20 are provided on the toggle levers and adapted to engage the bail arms to limit the opening movement of said bottom.

The bottom 10 is provided with a downwardly projecting flange 21 adjacent its forward end which is adapted to be engaged over the edge of a bin or other receptacle 22 into which the materials such as rivets carried by the bucket are to be discharged.

In operation, the bucket is mounted on a buggy or car which may be pushed under the loading chute of a storage bin and loaded, 80 and then the buggy is moved out under the monorail system where the hoist operator may pick it up. The hoist operator will lower the hoist hook 5 and engage it with the bail 7 of the bucket A. The hoist is then 35 operated to raise the bucket to a level at which it will clear all obstructions under the monorail.

The operator will then manipulate the hoist mechanism to cause the hoist to travel along the monorail and thereby convey the loaded bucket to the point of discharge.

When the bucket is moved into positionabove the bin or receptacle the operator stops the travel of the hoist and lowers the bucket until the flange 21 on the bucket is engaged over the edge of the receptacle22. Continued lowering of the bucket will cause the toggle levers 16 to rotate rearwardly past the center of their pivotal mounting so as to release the bottom 10.

After the bottom 10 has been released the operator will change the operation of the hoist to lift on the bail 7, thereby elevating .the bucket so as to permit the bottom 10 to drop and discharge the load. The stops 20 on the toggle levers will engage the arms of the bail 7 to limit the drop of the bottom 10.

After discharging the load, the bucket is raised to clear the bins or other receptacles and is carried by the hoist to an open space where the bucket is lowered to the shop floor to force the bottom 10 into closed position.

As the bucket is lowered the forward end of the bottom 10 touches the floor first and the weight of the body causes the toggle levers to rotate about their pivotal connections 18 until the pivotal connections 17 are moved rearwardly beyond the bail arms, thus locking the bottom 10 in position.

While I have shown and described one specific embodiment of my invention it will be understood that I do not wish to be lim- -ited thereto since various modifications may be made without departing from the scope thereof, as defined in the appended claims.

I claim:

1. An automatic dumping bucket for discharging its load into bins comprising a body composed of side and end walls all rigidly secured together, a bottom member hingedly secured at one end to the body, said bottom member being provided with side plates extending upwardly along the sides of said body for an appreciable distance, a bail pivotally secured to the sides of the body midway between the ends and adjacent the upper edge of said sides, said bail having its arms extending downwardly an appreciable distance beyond the pivotal mountings of said bail, toggle levers pivotally mounted at one end on the side plates of said bottom at a point materially below the pivotal mountings of said bail and slightly to the rear thereof, said toggle levers having their other ends pivotally connected to the lower ends of said bail arms, whereby said toggle arm is adapted to be swung forward of its pivot point when said bottom is in closed posi tion, said bucket being adapted to have its forward edge tilted upwardly by resting said edge on the edge of a bin or other rigid structure and lowering the bucket prior to opening the bottom so as to rock said toggle levers rearwardly beyond the center of their ivotal connection with said bottom, said ucket being then lifted by a lying a lifting force to said bail and sai bottom being free to swing downwardly into open position.

2. An automatic dumping bucket for discharging its load into bins comprising a body composed of side and end walls all rigidly secured together, a bottom member hingedly secured at one end to the body, said bottom member being provided with side plates extending upwardly along the sides of said body for an appreciable distance, a bail pivotally secured to the sides of the body midway between-the ends and adjacent the upper edge of said sides, said bail having its arms extending downwardly an appreciable distance beyond the pivotal mountings of said bail, toggle levers pivotally mounted at one end on the side plates of said bottom at a point materially below the pivotal mountings of said bail and slightly to the rear thereof, said toggle levers having their other ends pivotally connected to the lower ends of said bail arms, whereb said toggle arm is ada ted to be swung orward of its pivot point when said bottom is in closed position, said bucket being adapted to have its forward edge tilted upwardly by resting said edge on the edge of a bin or other rigid structure and lowering the bucket prior to opening the bottom so as to rock said toggle levers rearwardly beyond the center of their ivotal connection with said bottom, said buc et being then lifted by a plying a lifting force to said bail and s'ai bottom being free to swing downwardly into open position, means on said toggle levers for limiting the downward movement of said bottom, and means for limiting the forward movement of said toggle levers when the bottom is in closed position.

3. An automatic dumping bucket for discharging its load into bins comprising a body composed of side and end walls all rigidly secured together, a bottom member hingedly secured at one end to the body, said bottom member being provided with side plates extending upwardly along the sides of said body for an appreciable distance, a bail pivotally secured to the sides of the body midway between the ends and adjacent the upper edge of said sides, said bail having its arms extending downwardly an appreciable distance beyond the pivotal mountings of said bail, toggle levers pivotally mounted at one end on the side plates of said bottom at a point materially below the pivotal mountings of said bail and slightly to the rear thereof,

said toggle levers having their other ends pivotally connected to the lower ends of said bail arms, whereby said toggle arm is adapted to be swung forward of its pivot point when said bottom is in closed position, a downwardly projecting lip or flange extending transversely of said bottom adjacent the forward edge thereof, said bucket being adapted to be lowered over a bin or other rigid structure so as to engage said flange over the edge of said structure, whereby continued lowering of said bucket will cause the rear end of said bucket to be tilted downwardly below the forward end to rock the toggle levers rearwardly beyond the center of their pivotal connection with said bottom, said bucket being then lifted by applying a lifting force to said bail and said bottom being free to swing downwardly into open position.

In testimony whereof, I have hereunto set my hand.

GEORGE MIGHELL 'WAKEFIELD. 

